Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
  • B29C73/04—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D using preformed elements
  • B29C73/10—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D using preformed elements using patches sealing on the surface of the article
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/16—Nitrogen-containing compounds
  • C08K5/32—Compounds containing nitrogen bound to oxygen
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J7/00—Adhesives in the form of films or foils
  • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2030/00—Pneumatic or solid tyres or parts thereof
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J2407/00—Presence of natural rubber
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J2409/00—Presence of diene rubber
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J2421/00—Presence of unspecified rubber
  • C09J2421/006—Presence of unspecified rubber in the substrate
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T152/00—Resilient tires and wheels
  • Y10T152/10—Tires, resilient
  • Y10T152/10882—Patches

Definitions

• the invention relates to the use of an adhesive composition between a vulcanized rubber part and a green or prevulcanized or vulcanized rubber part intended to serve as bonding rubber of two raw or prevulcanized or vulcanized rubber parts for retreading tires. used or the manufacture of plasters for the repair of tires.
• Tire repair plasters especially used radial tire tires, comprise an assembly of different layers of rubbers, with or without reinforcing elements in the form of cables generally of synthetic textiles and a thin layer of a composition adhesive rubber to be applied to the inner liner of the tire casing at the location of the envelope to be repaired.
• vulcanization accelerators conventionally supposed to work at low temperature did not make it possible to obtain a satisfactory level of crosslinking for the use as bonding rubber of two pieces of raw or prevulcanized rubber. or vulcanized for retreading or repairing tires below 45 ° C.
• the inventors then turned to another concept, namely to induce crosslinking via a compound with very reactive double functions with natural rubber (NR) from room temperature and have selected from such compounds the use of aryl dinitrile oxide compounds and more particularly among them mesitylene dinitrile oxide (MDNO).
• NR natural rubber
• Patent FR 1,583,406 discloses the creation of dinitrile polyfunctional oxides in situ in polymer matrices to allow the crosslinking of the polymers constituting such matrices, among which among others polybutadienes, natural rubber, butadiene-styrene copolymers, butyl rubber , in a temperature range from 0 0 C to 100 0 C while recommending to use at room temperature, the crosslinking then requiring several days.
• This in situ creation is justified by the great instability of dinitrile polyfunctional oxides.
• EP 0,903,338A2 describes a method for the synthesis of stable aryl dinitrile oxide compounds, including MDNO, and indicates that these compounds can be used as "baking” or "vulcanization” agents for latex of olefin polymers saturated with temperature. room.
• US Pat. No. 6,252,009B1 discloses the use of stable dinitrile oxides, including MDNO, for the vulcanization of acrylic polymers.
• a "firing" system capable in diene elastomer compositions, that is to say highly unsaturated, for binding gums used for retreading or plasters for the repair of pneumatic, to give both a cooking at room temperature between 20 0 C and 30 0 C in a short time of not more than 24 hours and a high crosslinking yield after baking at room temperature.
• the object of the invention relates to the use of an adhesive composition between a piece of vulcanized rubber and a piece of raw or prevulcanized or vulcanized rubber, based on at least one highly unsaturated elastomer selected from the group consisting of natural rubber, polyisoprene, polybutadiene, styrene-butadiene, styrene-isoprene, butadiene-isoprene copolymers and styrene-butadiene-isoprene terpolymers, an aliphatic solvent and a "firing" system comprising at least one stable oxide aryl dinitrile compound .
• the stable aryl dinitrile oxide compound is mesitylene dinitrile oxide, MDNO, and bismésitylene dinitrile oxide, BMNO.
• the stable content of aryl dinitrile oxide compound is between 1 to 20 phr, parts by weight per hundred parts of elastomer, preferably between 2 and 15 phr and even more preferably between 5 and 10 phr.
• the use temperature is less than 60 ° C., preferably the use temperature is between 18 ° C. and 45 ° C.
• the vulcanized rubber part is constituted by a part of a tire, in particular it is constituted by the carcass, the tread, a sidewall of the tire or the inner liner of said tire.
• the vulcanized rubber part is constituted by a portion of a pneumatic tire for heavy goods vehicles, for civil engineering or for aircraft.
• the green or vulcanized or prevulcanized rubber component is constitutive of a tire repair plaster.
• the invention also relates to a tire repair plaster comprising at least one piece of raw or prevulcanized or vulcanized rubber and an adhesive composition based on at least one highly unsaturated elastomer selected from the group consisting of natural rubber, polyisoprene, polybutadiene, styrene-butadiene, styrene-isoprene, butadiene-isoprene copolymers and styrene-butadiene-isoprene terpolymers, an aliphatic solvent and a "firing" system comprising at least one stable aryl dinitrile compound.
• a tire repair plaster comprising at least one piece of raw or prevulcanized or vulcanized rubber and an adhesive composition based on at least one highly unsaturated elastomer selected from the group consisting of natural rubber, polyisoprene, polybutadiene, styrene-butadiene, styrene-isopren
• the invention also relates to a tire comprising at least one composition based on at least one highly unsaturated elastomer chosen from the group consisting of natural rubber, polyisoprene, polybutadiene, styrene-butadiene, styrene-isoprene and butadiene copolymers. isoprene and styrene-butadiene-isoprene terpolymers, an aliphatic solvent and a "firing" system comprising at least one stable aryl dinitrile compound.
• any range of values designated by the expression "between a and b" represents the range of values from more than a to less than b (i.e. terminals a and b excluded) while any range of values designated by the term “from a to b” means the range from a to b (i.e., including the strict limits a and b).
• elastomer or “diene” rubber it is to be understood in a known way (one or more elastomers), at least in part (ie, a homopolymer or a copolymer) of diene monomers (monomers carrying two carbon-carbon double bonds, conjugated or otherwise).
• diene elastomers can be classified into two categories: “essentially unsaturated” or “essentially saturated”.
• the term “essentially unsaturated” is generally understood to mean a diene elastomer derived at least in part from conjugated diene monomers, having a level of units or units of diene origin (conjugated dienes) which is greater than 15% (mol%);
• diene elastomers such as butyl rubbers or copolymers of dienes and alpha-olefins of the EPDM type do not fall within the above definition and may in particular be described as "substantially saturated” diene elastomers ( low or very low diene origin, always less than 15%).
• the term “highly unsaturated” diene elastomer is particularly understood to mean a diene elastomer having a content of units of diene origin (conjugated dienes) which is greater than 50%.
• the diene elastomer of the composition in accordance with the invention is preferably chosen from the group of highly unsaturated diene elastomers consisting of polybutadienes (abbreviated as "BR"), synthetic polyisoprenes (IR) and natural rubber (NR). butadiene copolymers, isoprene copolymers and mixtures of these elastomers. Such copolymers are more preferably selected from the group consisting of butadiene-styrene copolymers (SBR), isoprene-butadiene copolymers (BIR), isoprene-styrene copolymers (SIR) and isoprene-copolymers. butadiene-styrene (SBIR).
• SBR butadiene-styrene copolymers
• BIR isoprene-butadiene copolymers
• SIR isoprene-styrene copolymers
• the composition may furthermore comprise additives usually used in tire skin rubber compositions, such as zinc oxide, stearic acid or zinc stearate, or resin (s).
• additives usually used in tire skin rubber compositions such as zinc oxide, stearic acid or zinc stearate, or resin (s).
• mesitylene dinitrile oxide, MDNO, and bismésitylene dinitrile oxide, BMNO are particularly suitable. Their synthesis is described in particular in the patent application EP 0.903.338A2 and in the following publications:
• the adhesive compositions in accordance with the invention are evaluated by an adhesion test.
• the adhesion test consists in measuring the uniaxial tension pulling force of an assembled multi-component test specimen comprising, on the one hand, the adhesive composition with the "baking" system, the gum binding and two vulcanized compositions. The specimen is heat treated under pre-defined conditions so that the adhesive composition can crosslink.
• there are two assemblies in the test tube both of which correspond to the assembly of a retread or repair glue glued thanks to the adhesive composition to a surface portion of a tire respectively corresponding to a part of a tire. a carcass ply NC for one of the assemblies and a part of a tire lining rubber for the other.
• the test piece used in the adhesion test is thus a stack of components: (i) a vulcanized rubber part corresponding to a surface element of a tire (reinforced textile reinforcement ply, carcass ply side NC), (ii) an adhesive composition according to the invention, (iii) a composition constituting the retreading or repair gum in the form of a thin green layer, iv) an adhesive composition according to the invention and (v) a vulcanized rubber part corresponding to a surface element of a tire (GI rubber side).
• the material (i) is a mixture based on NR, black, extension oil and other usual additives comprising a vulcanization system based on sulfur and vulcanization accelerators.
• the material (v) is a mixture of butyl rubber (isobutylene and isoprene copolymer), carbon black, extender oil and other conventional additives comprising a conventional vulcanization system based on sulfur and vulcanization accelerators.
• the composition (iii), produced in the form of a very fine raw mixture layer, is a NR-black-extension oil mixture without accelerator (s) according to the formulation below:
• Soluble Sulfur 2 This latter mixture represents a typical repair plaster.
• an adhesive composition according to the invention is carried out in the form of a dissolution composed of a volume of solvent, free of sulfur and accelerator (s). , a diene elastomer, in this case plasticized NR and additives of the following formulation 1: pg mL
• the RESIN-OPFT resin is an octyl-substituted formophenolic resin
• PTF represents the total weight of the components in phr and grams of the formulation, respectively, excluding the solvent.
• a control sample is also made with a control composition in the form of a dissolution of the binding gum corresponding to the following formulation 2:
• the plasticized natural rubber (NR) is weighed and introduced into small pieces in a 500 mL sealed bottle and then 70 mL of heptane is added. The bottle is closed and then homogenized while keeping the bottle under stirring overnight. The next day is weighed and introduced into a second bottle of 250 mL the various constituents other than NR, if necessary crushed. 20 ml of heptane are then added and the flask is then stirred for one hour at room temperature (22 ° C.). The solution obtained is then passed to the ultrasonic bath for 5 minutes. minutes, then let stand for 5 minutes and again ironed for an additional 5 minutes.
• NR plasticized natural rubber
• test pieces thus made are used for carrying out the adhesion test under the following conditions:
• the adhesion test is carried out at room temperature using an INSTRON 5565.
• the test piece is fixed at its 2 ends to an area of 3 cm by mordings.
• the upper part of the apparatus moves at 100mm / min until the rupture of the specimen occurs.
• the force N is represented as a function of the elongation of the test piece.
• This force N which is also known as the "tearing force" is related to the crosslinking efficiency: a large tearing force means a high crosslinking yield.
• Formulations 1 and 2 are used to make 2 test pieces tested according to the protocol described above and the measurement results are recorded in the table below.
• the level of crosslinking reaches the level of crosslinking required for this type of application of rubber, namely as rubber of two pieces of raw or prevulcanized rubber or vulcanized rubber for the manufacture of retreaded tires for trucks, including radial carcass, or the manufacture of plasters intended repairing used tires

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Tires In General (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=41119886

Family Applications (1)

Country Status (8)

Cited By (1)

Families Citing this family (6)

Citations (5)

Family Cites Families (5)

• 2009
  • 2009-03-31 FR FR0952051A patent/FR2943681B1/fr not_active Expired - Fee Related
• 2010
  • 2010-03-30 BR BRPI1013178A patent/BRPI1013178A2/pt not_active IP Right Cessation
  • 2010-03-30 EP EP10711404.3A patent/EP2414448B1/fr not_active Not-in-force
  • 2010-03-30 JP JP2012502631A patent/JP5607139B2/ja not_active Expired - Fee Related
  • 2010-03-30 WO PCT/EP2010/054172 patent/WO2010112492A1/fr active Application Filing
  • 2010-03-30 EA EA201171187A patent/EA020474B1/ru not_active IP Right Cessation
  • 2010-03-30 CN CN201080012891.2A patent/CN102361922B/zh not_active Expired - Fee Related
  • 2010-03-30 US US13/258,560 patent/US20120196976A1/en not_active Abandoned

Patent Citations (6)

Non-Patent Citations (3)

Also Published As

Similar Documents

Legal Events